The mechanism of linkage-specific ubiquitin chain elongation by a single-subunit E2.

The mechanism of linkage-specific ubiquitin chain elongation by a single-subunit E2.
复制标题

DOI:
10.1016/j.cell.2011.01.035
复制
发表时间:
2011-03-04
期刊:
影响因子:
64.5
通讯作者:
Rape M
Rape M
中科院分区:
生物学1区
文献类型:
--
作者:
Wickliffe KE;Lorenz S;Wemmer DE;Kuriyan J;Rape M

文献摘要

参考文献

被引文献

相似文献

不同拓扑结构的泛素链会引发不同的功能后果,包括蛋白质降解和复合物重组。大多数泛素链的组装是由 E2 促进的,但人们对这些酶如何实现连锁特异性却知之甚少。我们发现,K11 特异性 Ube2S 通过除了 E2 活性位点的硫酯键之外还发生的重要非共价相互作用来定向供体泛素。 E2 供体泛素复合物主要通过静电相互作用瞬时识别受体泛素。对 Lys11 周围而非其他赖氨酸周围的受体泛素表面的识别会产生具有催化活性的活性位点,该活性位点由 Ube2S 和泛素的残基组成。我们的研究表明单体 E2 通过底物辅助催化促进连接特异性泛素链的形成。
Ubiquitin chains of different topologies trigger distinct functional consequences, including protein degradation and reorganization of complexes. The assembly of most ubiquitin chains is promoted by E2s, yet how these enzymes achieve linkage specificity is poorly understood. We have discovered that the K11-specific Ube2S orients the donor ubiquitin through an essential non-covalent interaction that occurs in addition to the thioester bond at the E2 active site. The E2-donor ubiquitin complex transiently recognizes the acceptor ubiquitin, primarily through electrostatic interactions. The recognition of the acceptor ubiquitin surface around Lys11, but not around other lysines, generates a catalytically competent active site, which is composed of residues of both Ube2S and ubiquitin. Our studies suggest that monomeric E2s promote linkage-specific ubiquitin chain formation through substrate-assisted catalysis.
DOI: 10.1038/nature08595
发表时间: 2009-12-03
期刊: Nature
影响因子: 64.8
作者:
通讯作者: --
DOI: 10.1073/pnas.0907887106
发表时间: 2009-10-27
影响因子: 11.1
作者:
Williamson, Adam;Wickliffe, Katherine E.;Rape, Michael
通讯作者: Rape, Michael
DOI: 10.1073/pnas.0912802107
发表时间: 2010-01-26
影响因子: 11.1
作者:
Wu, Tao;Merbl, Yifat;Kirschner, Marc W.
通讯作者: Kirschner, Marc W.
DOI: 10.1016/j.cell.2005.10.032
发表时间: 2006-01-13
期刊: CELL
影响因子: 64.5
作者:
Rape, M;Reddy, SK;Kirschner, MW
通讯作者: Kirschner, MW
DOI: 10.1038/sj.onc.1207861
发表时间: 2004-08-26
期刊: ONCOGENE
影响因子: 8
作者:
Wagner, KW;Sapinoso, LM;Hampton, GM
通讯作者: Hampton, GM